Gourmets quibble, eating banger (5)
I believe the answer is:
squib
'banger' is the definition.
(type of firework)
'gourmets quibble eating' is the wordplay.
'eating' indicates the answer is hidden within the clue.
'SQUIB' can be found hidden inside 'gourmets quibble'.
(Other definitions for squib that I've seen before include "Lampoon; firework" , "Jumping firework" , "Firework (perhaps damp!)" , "Firecracker" , "piece of satire" .)